Well, I've been lurking around here for quite a while now, and decided to put some of what I've seen to use. This is my first spud gun, not counting a spray and pray that my dad made me when I was 13.

It's a 24"x4" combustion chamber with metered propane injection, an internal fan, and ball valve for venting. It looks pretty rough right now, but now that I got it together and working, the paint job and other details are next.

Me and a couple of friends had a cookout, so we decided to try the cannon out, and we had a blast... get it? Blast... I made a compilation video of us out there.

Here's another vid that I made, and before any one starts yelling "UNSAFE ACT!!!" It was completely fake and created using video effects. Actually the first shot from the other video is what we used to make this. It's a William Tell Shot, Spud Gun Style.

Cheers, I hope you like it. Feel free to give pointers. Matt

Edited by jrrdw, video link removed.

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Here's the gun before I installed the fan and ball valve.

spudgun1.jpg (33.48 KiB) Viewed 1160 times

mixing and ventilation fan.

spudgun2.jpg (28.96 KiB) Viewed 1160 times

now I have the ball valve installed.

spudgun3.jpg (25.44 KiB) Viewed 1160 times

Here's a damage shot on a 55 gallon drum used for a fire barrel. I WISH I had that shot on video... the sound was great, and the plume of ash that flew up out of the barrel looked like an explosion.

I would, but the owner of said barrel didn't know it would punch a hole in it in the first place. Because of the damage from the first shot, they nixed the idea of any further shots, but I'm sure I can find something else to shoot at.

True, but were kinda limited to what we have on hand. And all of the cars around here are currently serving other purposes than spudding targets. however, there is a large supply of old building materials... Maybe make a mini town to lay siege to...

Gun Freak: Yeah, I thought about that after watching the video a few times, but now I have a coupler/reducer/ball valve there, so there's much more structural integrity there. I was actually thinking of mounting a small length of pvc to act as a sight/scope, but mainly for looks. I want a way to line it up easily that will keep heads and faces away from the body in the event of a rupture, but I'm not sure what to do yet.

jackssmirkingrevenge: I was thinking about a barrel support like that, but depending on the heat/humidity as well as thread cleanliness, the screw in barrel may not be lined up the same each time it's attached. That might make firing it more awkward than would be practical. A coupler setup might be the way to go if that support is what I end up doing with it. Another thought I had was to make a pvc bipod with a support sleeve in the middle to keep the barrel level, straight and easy to aim with a single operator.